kernel: update flow offload patches to upstream version

Move patches to backport-5.10, since the series was accepted upstream

Signed-off-by: Felix Fietkau <nbd@nbd.name>

1 files changed, 46 insertions, 0 deletions

diff --git a/target/linux/generic/backport-5.10/610-v5.13-08-netfilter-flowtable-call-dst_check-to-fall-back-to-c.patch b/target/linux/generic/backport-5.10/610-v5.13-08-netfilter-flowtable-call-dst_check-to-fall-back-to-c.patch
new file mode 100644
index 0000000000..276785030d
--- /dev/null
+++ b/target/linux/generic/backport-5.10/610-v5.13-08-netfilter-flowtable-call-dst_check-to-fall-back-to-c.patch
@@ -0,0 +1,46 @@
+From: Pablo Neira Ayuso <pablo@netfilter.org>
+Date: Tue, 23 Mar 2021 00:56:26 +0100
+Subject: [PATCH] netfilter: flowtable: call dst_check() to fall back to
+ classic forwarding
+
+In case the route is stale, pass up the packet to the classic forwarding
+path for re-evaluation and schedule this flow entry for removal.
+
+Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
+---
+
+--- a/net/netfilter/nf_flow_table_ip.c
++++ b/net/netfilter/nf_flow_table_ip.c
+@@ -197,14 +197,6 @@ static bool nf_flow_exceeds_mtu(const st
+ 	return true;
+ }
+ 
+-static int nf_flow_offload_dst_check(struct dst_entry *dst)
+-{
+-	if (unlikely(dst_xfrm(dst)))
+-		return dst_check(dst, 0) ? 0 : -1;
+-
+-	return 0;
+-}
+-
+ static unsigned int nf_flow_xmit_xfrm(struct sk_buff *skb,
+ 				      const struct nf_hook_state *state,
+ 				      struct dst_entry *dst)
+@@ -256,7 +248,7 @@ nf_flow_offload_ip_hook(void *priv, stru
+ 
+ 	flow_offload_refresh(flow_table, flow);
+ 
+-	if (nf_flow_offload_dst_check(&rt->dst)) {
++	if (!dst_check(&rt->dst, 0)) {
+ 		flow_offload_teardown(flow);
+ 		return NF_ACCEPT;
+ 	}
+@@ -476,7 +468,7 @@ nf_flow_offload_ipv6_hook(void *priv, st
+ 
+ 	flow_offload_refresh(flow_table, flow);
+ 
+-	if (nf_flow_offload_dst_check(&rt->dst)) {
++	if (!dst_check(&rt->dst, 0)) {
+ 		flow_offload_teardown(flow);
+ 		return NF_ACCEPT;
+ 	}